The pkg package is always installed on OpenIndiana so test with different one.

--- setuptools-80.9.0/setuptools/tests/test_editable_install.py.orig
+++ setuptools-80.9.0/setuptools/tests/test_editable_install.py
@@ -613,23 +613,23 @@
     def test_no_recursion(self, tmp_path):
         # See issue #3550
         files = {
-            "pkg": {
-                "__init__.py": "from . import pkg",
+            "_pkg": {
+                "__init__.py": "from . import _pkg",
             },
         }
         jaraco.path.build(files, prefix=tmp_path)
 
         mapping = {
-            "pkg": str(tmp_path / "pkg"),
+            "_pkg": str(tmp_path / "_pkg"),
         }
         template = _finder_template(str(uuid4()), mapping, {})
 
         with contexts.save_paths(), contexts.save_sys_modules():
-            sys.modules.pop("pkg", None)
+            sys.modules.pop("_pkg", None)
 
             self.install_finder(template)
-            with pytest.raises(ImportError, match="pkg"):
-                import_module("pkg")
+            with pytest.raises(ImportError, match="_pkg"):
+                import_module("_pkg")
 
     def test_similar_name(self, tmp_path):
         files = {